I can't hold it in anymore, I'm so excited for the final Season of LOST that I have spent a solid 45 minutes coming over the details in the poster. I've analyzed everything from the placement of the characters to the spots and slashes in the letters. Couple things to notice
1. Faraday, Boone, Miles, Michael, Ana Lucia, Charlotte, Lapidus, Shannon, Desmond, Mr. Eko, Kate, Jack, Sawyer, Locke, Ben, Sayid, Libby, Sun, Jin, Claire, Hurley, Juliet, Charlie, Richard, Bernard, Rose and Vincent all appear on the poster.
2. Locke's back is turned to us, this is important, probably because he is evil.
3. 2010 has four digits, which is the same amount of letters in "LOST." I'm just kidding this is not a clue, or is it?
4. There clearly is shark fin over Desmond and Mr. Eko's head which either alludes to Desmond's real life sexual harrasment case or Mr. Eko's prowess at driving a "shark" submarine in GI JOE.
5. The smoke monster is all over the poster, that's him in the black background.